body {
    background-image: url(./img1/wzry.jpg);
    background-repeat: no-repeat;
}

.part {
    width: 1000px;
    height: 80px;
    background-color: rgba(0, 0, 0, 0.5);
    margin: 0 auto;
}

.part ul {
    text-align: center;
    display: flex;
    justify-content: space-between;
}

.part ul li {
    width: 110px;
    height: 80px;
    font-size: 20px;
    font-weight: 500;
    line-height: 80px;
    display: block;
}

.part ul li a {
    color: white;
}

.part ul li:hover a {
    color: #ffdd4d;
    background-color: rgba(0, 0, 0, 0.5);
    display: block;
}

.part ul li:hover>ol {
    display: block;
}


/*下拉列表菜单*/

.part ol {
    background-color: rgba(0, 0, 0, 0.5);
    list-style: none;
    display: none;
}

.part ol li:hover {
    background-color: rgba(155, 155, 151, 0.5);
}

.part ol li:hover a {
    background-color: ;
    color: #ffdd4d;
}